Robot arm



FIG. 1 is an upper perspective view of the robot arm showing my design.

FIG. 2 is a side view thereof;

FIG. 3 is an opposite side view thereof;

FIG. 4 a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a back view thereof; and,

FIG. 8 is another perspective view thereof, showing attachment to arobot arm in broken lines.

The portions shown in broken lines are for illustrative purposes onlyand form no part of the claimed design.

The ornamental design for a robot arm, as shown and described.